An SKF Group Company
How to order Vibracon® chocks
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Vibracon manual, chapter 2
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How to order Vibracon® chocks 2.1 HOW TO SELECT THE RIGHT VIBRACON® CHOCK SIZE?...............................3 2.2 HOW TO GET A VIBRACON® CHOCKING PROPOSAL FREE OF CHARGE? ........3 2.3 HOW TO ORDER VIBRACON® CHOCKS? .....................................................4 2.3.1 The Original ...........................................................................................................4 2.3.1.1 Article numbers Vibracon® Original chocks.......................................................5 2.3.2 The Low Profile ......................................................................................................5 2.3.2.1 Article numbers Vibracon® Low Profile chocks .................................................6 2.3.3 The extended Vibracon® Original and Low Profile.................................................6 2.3.3.1 Article numbers Vibracon® additional bottom rings ...........................................7
APPENDIX 1 DATA SHEETS FOR VIBRACON® CALCULATION APPENDIX 2 EXAMPLE OF CHOCKING PROPOSAL
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Vibracon manual, chapter 2
2.1
How to select the right Vibracon® chock size?
To get an indication which size of Vibracon® should be used, the following parameters will give you an impression: • •
What is the size of the bolthole in the component bed plate? What is the minimum distance (pitch) between two adjacent holes?
The type indication of Vibracon® is related to the foundation bolts for which they can be used. For instance the Vibracon® SM30 is developed to be used in combination with a hexagonal bolt M30 but it is also possible to use one size of bolt diameter bigger, in this example a bolt M33.
2.2
How to get a Vibracon® chocking proposal free of charge?
As a part of our service, Machine Support offers you a free of charge calculation proposal for the mounting of your component. To prepare this calculation we need information concerning the component, the available chocking height and some information concerning the foundation. The fastest way to receive a chocking proposal for your application is to fill out one of the appropriate datasheets (APPENDIX 1). The datasheets can also be downloaded from our website www.machinesupport.com we ask you to send the completed datasheets by e-mail to:
[email protected] The used calculation software is approved by the Classification Societies involved for marine applications. On request Machine Support will make contact with the OEM to support you with getting an agreement on the chocking proposal. Normally you will receive, within one day, a calculation as mentioned in APPENDIX 2. A full proposal consists of four sheets: • • • •
Report of all information related to the selection of the chock, including operating forces on the chocks plus foundation hardware information; Illustration of the top view of the component that shows the location of the chocks, the position of the positioning and / or collision chocks and the fitted bolts (if required); Illustration of the cross section of the foundation bolt in which the clamping length and foundation bolt are specified; Illustration of the cross section of the fitted bolt, if required, in which the clamping length and fitted bolt are specified.
Machine Support, upon request, will submit our report to the involved Classification Society for approval. Costs for this service are on an as negotiated and per event basis.
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Vibracon manual, chapter 2
2.3
How to order Vibracon® chocks?
In the Vibracon® brochure (see chapter 1) you will find an overview of the standard elements. If you have a specific component which has to be chocked and the standard elements will not fit, please don’t hesitate to send in your demands and we will find out if we can provide you a proper solution. Based on the unique article numbers the chocks can be ordered by fax, mail or e-mail. As soon as we have received your order we will send you an order conformation in reply. Vibracon® chocks are always on stock at Machine Support in the Netherlands. However, it is recommended to check the delivery time before ordering. Our local dealers of the elements also have some elements on stock. A list of all distributors is available on the website from Machine Support:
www.machinesupport.com 2.3.1 The Original Vibracon® SM chocks are machinery mounting chocks that are easily and accurately adjusted. The chocks accommodate up to a 4° angular difference between machine and the mounting base without expensive machining of the base or extra work of installing epoxy resin chocks. The self levelling capability combined with the height adjustment feature eliminates the possibility of a soft foot in the production line and for the life cycle of the machinery.
Figure 2.3.1 Vibracon® Original
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Vibracon manual, chapter 2
2.3.1.1
Article numbers Vibracon® Original chocks
The article numbers of the different sizes of chocks are as follows:
Material DIN 1.1191
Material DIN 1.4404 ( AISI 316L )
SM12CS
SM12SS
SM16CS
SM16SS
SM20CS
SM20SS
SM24CS
SM24SS
SM30CS
SM30SS
SM36CS
SM36SS
SM42CS
SM42SS
SM48CS
SM48SS
SM56CS
SM56SS
SM64CS
SM64SS ®
Figure 2.3.1.1 Article numbers Original Vibracon chocks
2.3.2 The Low Profile The Low Profile chocks offer an economic solution for repair projects or fixed design systems where expensive milled chocks, shims or epoxy resins were applied. The Vibracon® SM Low Profile configuration addresses those applications where the chock height between the foundation and component has been established by the previous design. Most of the other chocking methods are time consuming and do not support the life cycle needs of the machine owners and installation activities on a tight schedule. A variety of adjustment tools for confined installation spaces is available.
Figure 2.3.2 Vibracon® Low Profile
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Vibracon manual, chapter 2
2.3.2.1
Article numbers Vibracon® Low Profile chocks
The article numbers of the different sizes of chocks are as follows:
Material DIN 1.7225 ( other materials on request) SM12LP SM16LP SM20LP SM24LP SM30LP SM36LP SM42LP Figure 2.3.2.1 Article numbers Vibracon® Low Profile chocks
2.3.3 The extended Vibracon® Original and Low Profile It can happen that the maximum element height is not sufficient to fill up the gap between the foundation top plate and the bed plate of the component. In that situation it is possible to introduce a so called additional bottom ring to extend the maximum height of the Vibracon® Original and Low Profile chocks. This ring will be mounted between the base plate of the chock and the top plate of the foundation. As an alternative for the additional bottom ring Machine Support can also provide Vibracon® extended bottom rings. As a rule of thumb, the height of the chocks should not exceed the diameter of the elements. For instance the maximum height of a Vibracon® SM30, with a diameter of 140 mm, should not exceed a chock height of 140 mm.
Figure 2.3.3.1 SM element with additional bottom ring
Figure 2.3.3.2 SM - LP element with additional bottom ring
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Vibracon manual, chapter 2
2.3.3.1
Article numbers Vibracon® additional bottom rings
The article numbers of the additional bottom rings are as follows: Material: DIN 1.0570 / 1.1191
Article no.
Height additional ring
Max. extended height (D) SM element
Max. extended height (D) SM - LP element
SM12EV
22 mm
60 mm
Not available
SM16EV
35 mm
80 mm
65 mm
SM20EV
50 mm
100 mm
80 mm
SM24EV
63 mm
120 mm
93 mm
SM30EV
78 mm
140 mm
108 mm
SM36EV
93 mm
160 mm
133 mm
SM42EV
118 mm
190 mm
163 mm
SM48EV
135 mm
220 mm
Not available
SM56EV
140 mm
230 mm
Not available
SM64EV
155 mm
250 mm
Not available
Figure 2.3.3.1 Article numbers Vibracon® additional bottom rings
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Vibracon manual, chapter 2
APPENDIX 1 DATASHEET FOR VIBRACON CALCULATION
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Vibracon manual, chapter 2
Machine Support B.V., The Netherlands Phone
:
+31 (0)180 483828
Fax
:
+31 (0)180 483829
Website
:
www.machinesupport.com
E-mail
:
[email protected]
Selection of Vibracon SM element for Diesel/Gas/Turbine Engines Please insert data into coloured cells Shipyard / Customer Shipname / Project Classification society Object Make / type
: : : : :
Engine Mass Power Revolutions Number of elements Foundation bolthole diameter Fitted bolthole diameter
: : : : : :
(kg) (kW) (rpm) (-) (mm) (mm)
Top View of engine Total length of the component Location first hole (seen from coupling) Pitch between other holes (on one side) Total width of the component Pitch of boltholes (left to right) Foundation width (inside)
: : : : : :
(mm) (mm) (mm) (mm) (mm) (mm)
LEGEND A B C D E F
A C
COUPLING
B
F
E
Stopper clearance in accordance with manufacturer instructions
Steel side chocks
Cross section of mounting detail
G H J
D
Top sleeve length Bed plate thickness Chock height Top plate thickness Bottom sleeve length
: : : : :
(mm) (mm) (mm) (mm) (mm)
LEGEND G H J K L
Remarks:
K L Address information Company Contact Phone Fax E-mail
: : : : :
MS-F-333 REV. 04 D.D. 03.05.2005
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®
Vibracon manual, chapter 2
Machine Support B.V., The Netherlands Phone
:
+31 (0)180 483828
Fax
:
+31 (0)180 483829
Website
:
www.machinesupport.com
E-mail
:
[email protected]
Selection of Vibracon SM element for (Marine) Gearboxes Please insert data into coloured cells Shipyard / Customer Shipname / Project Classification society Object Make / type
: : : : :
Gearbox Mass Power Revolutions Number of elements Foundation bolthole diameter Fitted bolthole diameter Reduction rate Average distance of boltholes Distance between centre line of shaft and top plate Propulsion efficiency
: : : : : : : : : :
(kg) (kW) (rpm) (-) (mm) (mm) (-) (mm) (mm) (N/kW)
(For and aft chocks capable of transmitting 3 times nominal propeller thrust must be installed)
: : : : : :
(mm) (mm) (mm) (mm) (mm) (mm)
LEGEND A B C D E F
(mm) (mm) (mm) (mm) (mm)
LEGEND G H J K L
B
COUPLING
Top View of gearbox Total length of gearbox Location first hole (seen from coupling) Pitch between other holes (on one side) Total width of gearbox Pitch of boltholes (left to right) Foundation width (inside) A C
F
E
D
Cross section of mounting detail
G H J
Top sleeve length Bed plate thickness Chock height Top plate thickness Bottom sleeve length
: : : : :
Remarks:
K L Address information Company Contact Phone Fax E-mail
: : : : :
MS-F-332 REV. 04 D.D. 03.05.2005
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Vibracon manual, chapter 2
Machine Support B.V., The Netherlands Phone
:
+31 (0)180 483828
Fax
:
+31 (0)180 483829
Website
:
www.machinesupport.com
E-mail
:
[email protected]
Selection of Vibracon SM element for Generators/E-motors/Pumps/Comp. Please insert data into the coloured cells Shipyard / Customer Shipname / Project Classification society Object Make / type
: : : : :
Generator Mass Power Revolutions Number of elements Foundation bolthole diameter Fitted bolthole diameter
: : : : : :
(kg) (kW) (rpm) (-) (mm) (mm)
Top View of generator Total length of generator Location first hole (seen from coupling) Pitch between other holes (on one side) Total width of the component Pitch of boltholes (left to right) Foundation width (inside) Foot length
: : : : : : :
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
A
M
C
F
E
D
A
M
C
COUPLING
B
COUPLING
B
F
Cross section of mounting detail
G H J
Top sleeve length Bed plate thickness Chock height Top plate thickness Bottom sleeve length
LEGEND A B C D E F M
: : : : :
(mm) (mm) (mm) (mm) (mm)
E
LEGEND G H J K L
Remarks:
K L Address information Company Contact Phone Fax E-mail
: : : : :
MS-F-334 REV. 04 D.D. 03.05.2005
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Vibracon manual, chapter 2
APPENDIX 2 EXAMPLE OF CHOCKING PROPOSAL
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Vibracon manual, chapter 2
Machine Support B.V., The Netherlands
Shipyard / Customer Shipname / Project Classification society Object Make / type
: : : : :
Phone
:
Fax
:
+31 (0)180 483828 +31 (0)180 483829
Website
:
www.machinesupport.com
E-mail
:
[email protected]
Slippstödin ehf Baldvin NC-100 Det Norske Veritas Piston engine MaK 6M32
C-factor 5000
Selection of Vibracon SM element Machine Mass (if engine with water +oil) Power Revolutions Foundation width (bolt distance) Number of elements Bolthole diameter
: : : : : :
37500 2880 600 1400 18 35
(kg) (kW) (rpm) (mm) (-) (mm)
Correction / Safety factor
:
2
(-)
Minimum required Vibracon SM element
:
30
(-)
Advised Vibracon SM element
:
30
(-)
Element load (maximum) Element load (minimum) Machine load
: : :
24,05 16,78 48,11
(kN) (kN) (kN)
Calculation of holding down bolts' torque
MS REF. NUMBER : NE-04-0155-01-PW
Foundation bolt Foundation bolts Material E-modul Yield strength
: : 14 * M30 (L =420 mm) : grade 8.8 : 207000 : 630
(-) (-) (N/mm²) (N/mm²)
Elongation foundation bolt Tension per bolt Tensile stress Disposable yield strength Equivalent stress Disposable yield strength < 90 %
: : : : : :
0,62 243,3 468,7 74 552,0 88
(mm) (kN) (N/mm²) (%) (N/mm²) (%)
Tightening torque
:
1460
(Nm)
Fitted bolts Material E-modul Yield strength
: : : : :
4 * M30 (L =462 mm) 42 CrMo 4 207000 750
(-) (-) (N/mm²) (N/mm²)
Elongation of fitted bolt Tension per bolt Tensile stress Disposable yield strength Equivalent stress Disposable yield strength < 90%
: : : : : :
0,57 243,3 468,7 62 552,0 74
(mm) (kN) (N/mm²) (%) (N/mm²) (%)
Tightening torque
:
1460
(Nm)
Fitted stud bolt
MS-F-331 BLAD 1/1 REV.00 D.D. 01.08.2001
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REV. 27
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Vibracon manual, chapter 2
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Vibracon manual, chapter 2
MS-F-336 BLAD 1/1 REV.00 D.D. 01.08.2001
SKETCH
M30 x 3,5
Machine Support B.V. The Netherlands Phone +31 (0)180 483828 Fax +31 (0)180 483829 Website www.machinesupport.com E-mail
[email protected]
Root diameter 25,71 Sleeve Ø32 - Ø60
Bed plate
Top plate
MS REF. NUMBER: NE-04-0155-01-PW
SW30 (Spherical Washer)
APPROVAL : : : : : : : : : : Calculations are valid for bolts with ISO Metric screw thread and coarse pitch, minimum material grade 8.8, yield strength > 630 N/mm², oil lubricated thread courses and nut mating surfaces without slide additives.
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Vibracon manual, chapter 2
MS-F-337 BLAD 1/1 REV.00 D.D. 01.08.2001
SKETCH
M30 x 3,5
Machine Support B.V. The Netherlands Phone +31 (0)180 483828 Fax +31 (0)180 483829 Website www.machinesupport.com E-mail
[email protected]
Root diameter 25,71 Sleeve Ø32 - Ø60
Bed plate
Top plate
MS REF. NUMBER: NE-04-0155-01-PW
SW30 (Spherical Washer)
APPROVAL
: : : : : Calculations are valid for bolts with ISO Metric screw thread and coarse pitch, minimum material grade 8.8, yield strength > 630 N/mm², oil lubricated thread courses and nut mating surfaces without slide additives
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Vibracon manual, chapter 2
